This exit poll is about as ACCURATE as you'll get without institutional bias. It was done flat out on election day. End of story.
Why do people still talk about 2008? The 27% were quite delusional.
Around 90% OF LGBT people voted for Obama. Around 72% of Latinos voted for Obama. Around 90% of African Americans voted for Obama. 55% of women voted for Obama. This is all based on EXIT POLLING DATA that is highly scientific and accurate.